Answer:
Existence itself is not homogeneous. It is heterogeneous. That means there are various kinds and degrees of purity.
Answer:
5A: Northwest Region: Rocky Mountains
2B: West Region: Great Basin Desert
4C: South West Region: Grand Canyon
3D: Midwest Region: Great Plains
6E: Southeast Region: Everglades
1F: Mid-Atlantic Region: Many bays and good harbors
7G: Northeast Region: Rocky coastline and small coastal islands
Explanation:
Sedimentary rock layer is the most complex